The American Red Cross has launched its official Tornado App, putting lifesaving information right in the hands of people who live in, visit, or have loved ones in tornado-prone areas.

This free app—available in English and Spanish—gives iPhone, iPad and Android smart phone and tablet users instant access to local and real-time information, so they know what to do before, during and after a tornado. The app includes a high-pitched siren and “tornado warning!” alert that signals people when a NOAA tornado warning has been issued in their area—even if the app is closed. An “all clear!” alert lets users know when a tornado warning has expired or has been cancelled.

“Tornadoes often happen in the overnight hours when people are sleeping,” said Cheryl Bremer, Regional CEO of the Red Cross of West Michigan. “The audible alerts in this app can save lives, even if users can’t monitor the weather because they are away from radio, TV or in places where weather band radios may not work.”

Badges users can earn through interactive quizzes and share on social networks.

Launched during National Severe Weather Preparedness Week, the Tornado App is the latest in a series of mobile apps created by the Red Cross, the nation’s leader in emergency preparedness. The apps have been used to help save lives during hurricanes, earthquakes and wildfires.